CommandsStatsPoissonPDFOn this pageStatsPoissonPDF StatsPoissonPDF (x, λ) The StatsPoissonPDF function returns the Poisson probability distribution function. f(x;λ)=exp(−λ)λxx!,x=0,1,2…\displaystyle f(x ; \lambda)=\frac{\exp (-\lambda) \lambda^{x}}{x!}, \quad x=0,1,2 \ldotsf(x;λ)=x!exp(−λ)λx,x=0,1,2… where λ is the shape parameter. See Also Statistical Analysis, StatsPoissonCDF, StatsInvPoissonCDF